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Remy Lebeau (TeamB)
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 Posted: Wed Nov 19, 2003 11:09 pm Post subject: Re: How to send files and text from client to server... |
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"Santy Concepción" <NO*SPAM*SANTYCG (AT) terra (DOT) es> wrote
| Quote: | Have I to use two separate TCPServer components in the
server (one for messages and one for file receiving)???
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Typically, it is best to do file transfers on a separate connection, yes.
| Quote: | I have tried this (two tcpserver in server app and two tcpclient in
client-side app, but when I try to make the second connection, it fails:
"connection refused".
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Did you activate the second server? Did it activate correctly? Are you
sure that you are using a separate port number for it?
| Quote: | The problem is that while the file is being sent, client and server
have to stay connected, so the can send messages eachother.
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They should not have anything to do with each other. Separate connections
are completely separate from each other. However, if you want to drop the
file transfer connection if the communications connection goes down, that is
your choice. Sockets themselves do not enforce that. That is an
application design issue.
| Quote: | How can I know if the incoming data is a message or a file?
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Best to just use a separate connection that is dedicated to the file
transfer. But if you must share a single connection for both messages and
files, then you'll have to put a header block on every data packet that you
send (if you are not already), so that the receiver can look at the header
block and decide whether the packet describes message data or file data.
Also, when sending the file, send it in smaller pieces so that message
packets can still be transmitted in between them in a timely fashion.
Gambit
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Eugene Mayevski [SecureBl
Guest
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| Posted: Thu Nov 20, 2003 2:02 am Post subject: Re: How to send files and text from client to server... |
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Santy Concepción wrote:
| Quote: | The problem is that while the file is being sent, client and server have to
stay connected, so the can send messages eachother.
How can I know if the incoming data is a message or a file? Is it possible?
Is there any example of this?
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If you are dealing with messages, take a look at MsgConnect
([url]http://www.msgconnect.com)[/url]. It will definitely make your life easier.
--
Eugene Mayevski
EldoS Corp., CTO
Security and networking solutions
http://www.eldos.com
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